Mediki
Iron blood test: what your result means
Iron measures circulating iron available for transport and cellular use.
- Category
- Iron status
- Standard unit
- mmol/L
- Reported in
- mmol/L, µmol/L, µg/dL, µg/100mL, µg%, µg/L and more
What does high iron mean?
Higher values may suggest excess circulating iron or altered regulation. What counts as high depends on the reference range printed on your lab report, because ranges differ between laboratories.
What does low iron mean?
Lower values may suggest reduced available iron. What counts as low depends on the reference range printed on your lab report, because ranges differ between laboratories.
Iron units and conversion
Mediki shows iron in mmol/L. Labs may report it in other units; Mediki converts them automatically so results from different labs line up on one chart.
| Unit on your report | Convert to mmol/L | Convert back |
|---|---|---|
| µmol/L | 1 µmol/L = 0.001 mmol/L | 1 mmol/L = 999.9 µmol/L |
| µg/dL, µg/100mL, µg% | 1 µg/dL = 0.0001791 mmol/L | 1 mmol/L = 5,584 µg/dL |
| µg/L, ng/mL | 1 µg/L = 1.791 × 10-5 mmol/L | 1 mmol/L = 55,840 µg/L |
| mg/L | 1 mg/L = 0.01791 mmol/L | 1 mmol/L = 55.84 mg/L |
Convert a value from your report with the blood test unit converter.
Why track iron over time?
A single iron result is a snapshot. Comparing it with your earlier tests shows whether a value is stable, slowly drifting, or responding to a change in treatment or lifestyle, which is often more useful than one number on its own.
Read our guide on how to read blood test results to understand reference ranges, flags and units.
Following iron as part of a panel? See the ferritin and iron tracker.
Track your iron results in one chart
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Medical disclaimer: This page is general information, not medical advice. Reference ranges differ between laboratories, and only a doctor can interpret your results in the context of your health.